Why do you have to be such a dick? Tribot is the only bot on the market worth paying for and its well worth it
A bit of a loaded question, but I'll try explain some things.
I don't believe in paying in software (generally). That is, while I acknowledge it's one way of creating software, I don't think that it's always the best way. I'm sure you're all familiar with things like Linux which aren't sold, yet are still decent (and actually contributed to by major corporations). So in regards to Tribot being "worth" paying for, I think not. Specifically, I think Tribot would be much better if it was opensource.
If you're interested in learning more about opensource and Free Software, there are plenty of resources online describing the ideas behind it and how it can work, etc. Keep in mind though, on both sides of the table, there's a lot of bias and most of the content is propaganda. Try approach it with an analytical mind and you might be interested in the results.
I have other reasons for doing this though, of course. A friend asked me to do this for him, and I have a personal interest in helping out my friends if I can, but no personal interest in helping Trilez get an extra $5 (especially when it's so easy to dehumanize Trilez by making fun of his idiotic code).
For me, it's fun to do this kind of thing. There's fun to be had in a more academic application of these kinds of skills (though really, this kind of thing doesn't take 'skill', it takes understanding the HTTP protocol and that's about it), I find working with real software more fun. It gets even *more* fun when I get to watch an incompetent programmer try to implement features to prevent the crack.
In addition, I love the kind of irony that exists here. Tribot exists to automate the playing of Runescape. That is, to save you time, so you don't have to play it yourself, but you get the rewards (some of them, at least). Jagex is on a constant battle with botters to try shut them down, and bots come back each time. I enjoy watching the same kind of thing happen here, but in place of Jagex we have the makers of bots like Tribot battling with me writing cracks. It's almost like a delightful poetic justice.
However, keep in mind while I have strong ideals about software, the primary reason I do this *is* for fun. I have no vested interest in keeping this crack running. I don't use Tribot, I don't even have a Runescape account, nor do I have any intentions of playing it or botting or anything of the sort.
When it stops being fun (and it seems like with all the vain attempts at shutting down this crack so far, it's only going to get more fun), I'll stop doing it.
tldr; because it's fun.